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I am running on Fusion. The only reason why I choose fusion is because of work. We have 18 servers running on ESX 4.0 so I am a bit bias. ;)

So far no issues with Win 7.
 
I run Windows 7 using VMware Fusion. I haven't used VirtualBox or Parallels Desktop so I can't compare but it seems to run OK with Fusion. If I didn't own a virtualization product today then I'd probably be using VirtualBox since it's free. My advice would be to try VirtualBox and see if it meets your needs before trying VMware Fusion or Parallels Desktop.
 
I run Windows 7 using VMware Fusion. I haven't used VirtualBox or Parallels Desktop so I can't compare but it seems to run OK with Fusion. If I didn't own a virtualization product today then I'd probably be using VirtualBox since it's free. My advice would be to try VirtualBox and see if it meets your needs before trying VMware Fusion or Parallels Desktop.

Well, I actually have a copy of VMware Fusion and can obviously get VirtualBox, but I heard Parallels was working on Aero support. I was just wondering if it would or could ever happen?
 
I actually just installed Windows 7 64 bit on Fusion this morning. Gave it 1.8gb of ram with 2 virtual processors. Runs great and is speedy. Only issue I noticed was trying to run solitaire in unity....it kept closing on me. Not sure of the reason but it worked with other things like minesweeper and IE.

I haven't tried the other vm programs but i think fusion is running great. Btw, I chose fusion because it had 64 bit support while parallels doesn't (I think).
 
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